Cylinder Head Stud Removal Sequence

[Woody3]

Just removing the cylinder head on a 4/98NT Leyland engine.

It's been a while since I did a cylinder head removal.

I'm going to slacken the bolts off at quarter a turn at a time. Do I start in the middle of the head and work outwards?

I've got the tightening sequence in my workshop manual, but not the removal sequence.

Tightening sequence is:

13 9 5 2 7 11 15
14 6 1 8 16
10 3 4 12

Cheers!

[DuraAce]

Outside then work inwards, pretty much the opposite of the tightening sequence is what I do.

[Woody3]

That was a quick reply. I wasn't expecting a response 'til the morning! Back to the workshop I go...Thank you!

[DVandrews]

As a general rule, use a notional spiral / concentric circles from the centre of the head on doing them up, as the spiral encountes a head, the fastener is done up. When undoing, reverse this technique with a descending spiral from the outside.

Dave

Edited by DVandrews on Sunday 11th February 11:14

[227bhp]

DVandrews said:

As a general rule, use a notional spiral / concentric circles from the centre of the head on doing them up, as the spiral encountes a head, the fastener is done up. When undoing, reverse this technique with a descending spiral from the outside.

Dave

That's how I always remember them on a relatively normal four pot, but what he's got going on there is a very weird (or totally incorrect). A bit of a Google shows that these (unsurprisingly) are the valves for it: